Improvement in compositions for repairing crucibles



UNITED, STATES PATENT OFFICE.

JAMEs IRWIN, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR T0 THE PITTS- BUEGSTEEL CASTING ooMPANY, OF sAME PL oE.

IMPROVEMENT IN COMPOSITIONS FOR REPAIRING CRUCIBLES.

Specification forming part of Letters Patent No. 177,127, dated May 9,1876; application filed April 25, 1876.

To all whom it may concern: Be it known that L JAMES IRWIN, ofPittsburg, county of Allegheny, State of Pennsylvania, have invented ordiscovered a new and useful Composition for Repairing Grucibles; and Ido hereby declare the following to be a full, clear, concise, and exactdescription thereof.

In the operation of renewing partly WOIll or partly burned out crucibles(in metallurgic operations) various compounds have been-em-' ployed.After experimenting with ditfer'ent compounds for this purpose I havesucceeded in attaining the best results by the use of a mixtureot'sodaash, white glass-house sand, old crucibles, and fire clay. Theseingredients are pulverized and mixed inabout thefollowing proportions,by measure, viz: soda-ash,

two per cent; sand, two per cent; old crucibles,n1nety-two per cent;fire-clay, fourper be made thicker and plastered on. I also plaster orapply a coating of it to such parts of the inside of the crucible as maybe injured by the metal within or its fluxes. The crucibles then, whendry, are ready for use. After being used this coatingreadily scales orcrumbles oft, and the operation is repeated till the crucible isentirely burned out or becomes worthless. In this wayladd considerablyto the. life of a crucible at comparatively no expense.

I am aware that the process frenewing old crucibles by dipping, in themanner described, is not new, and I make no claim herein except to mysuperior compound. 1 claim as my invention A compound consisting ofsoda-ash, sand,

old crucibles, and fire-clay, com-pounded with water in about theproportions specified, and p for the uses set forth.

In testimony whereof I have hereunto set my 'hand. I

' JAMES IRWIN.

Witnesses:

-JOHN L. HULL, HENRY O. OVER.

